24AA02E48T-I/OT - 2Kb I2C EEPROM with EUI-48 MAC | Microchip
부품 번호: 24AA02E48T-I/OT ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.55 | $0.55 |
| 10 | $0.49 | $4.90 |
| 100 | $0.42 | $42.00 |
| 500 | $0.36 | $180.00 |
| 1,000 | $0.32 | $320.00 |
| 3,000 | $0.27 | $810.00 |
24AA02E48T-I/OT 개요
A serial EEPROM is a non-volatile memory that uses a simple two-wire (I2C) protocol to store small amounts of configuration data, calibration constants, or identity information that must survive power cycling. In the component hierarchy it sits under EEPROM -> non-volatile memory -> memory IC -> semiconductor. The integrated EUI-48 node address turns this device into a drop-in Media Access Control (MAC) identity source for Ethernet, Wi-Fi, Bluetooth, IEEE 802.15.4 and other networking nodes, eliminating the need for an external MAC allocation scheme.
Key features include software write protection for the upper 128 bytes, a hardware write-protect pin for full-array protection, page write capability of up to 8 bytes, and 1 million erase/write cycles endurance with greater than 200-year data retention. The 5-pin SOT-23-5 footprint (package code OT) is one of the smallest I2C EEPROMs available, making it ideal for space-constrained designs. The 'E48' suffix denotes the pre-programmed EUI-48 MAC address; the standard 'I' industrial grade covers -40C to +85C.
The 24AA02E48 uses a CMOS process with on-chip ECC-style reliability and a low-power design. Up to eight 24AA02E48 devices may share the same I2C bus through hardware address bits. Because the MAC is factory programmed and locked, every unit ships as a unique node, allowing designers to skip manual MAC allocation or OTP burn-in at production.
Typical applications include IoT sensor nodes requiring a unique MAC address, industrial automation modules, smart-meter communication boards, Bluetooth/Wi-Fi companion identification, and any embedded design that needs a tiny, low-power identity store. It is also used for storing configuration, calibration constants, and tamper-resistant settings in consumer devices.
When designing with the 24AA02E48, place a 100 nF decoupling capacitor close to VCC and respect I2C pull-up values per the bus specification. Because the EUI-48 is factory-locked, do not attempt to rewrite the unique-address region (upper 128 bytes) - that block is software-protected by design.
This page synthesizes verified distributor pricing, SOT-23-5 drop-in alternatives, and practical design notes that go beyond what is found in the Microchip datasheet (document 20002124H) alone.
드롭인 대체품: 24AA02E48T-I/OT — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: 24AA02E48T-I/OT (동일 폼 팩터 및 풋프린트) — 차이점: Data Retention, Memory Organization, Memory Type, Operating Temperature.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
24AA02E48-I/OT
✅ 드롭인✓ 재고 있음
$0.38 / 개
데이터시트 보기 →24AA02E48T-E/OT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
24AA025E48T-I/OT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
24AA02E64T-I/OT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
24AA02E48T-I/OT 최대 정격 & 전기적 특성
| 메모리 유형 | EEPROM (Non-Volatile) |
| 메모리 크기 | 2 Kbit (256 x 8) |
| Memory Organization | Two blocks of 128 x 8 |
| 인터페이스 | I2C (2-wire serial) |
| Clock Frequency (Max) | 400 kHz |
| Access Time | 900 ns |
| Operating Voltage (VCC) | 1.7 V to 5.5 V |
| Active Current (Max Read) | 1 mA |
| Standby Current (Max) | 1 uA |
| Page Write Size | 8 bytes |
| Write Cycle Endurance | 1,000,000 cycles |
| Data Retention | > 200 years |
| Unique ID Feature | Factory-programmed EUI-48 MAC address |
| Write Protection | Software (upper 128 bytes) + Hardware WP pin |
| 패키지 | SOT-23-5 (OT) |
| 동작 온도 | -40 C to +85 C (Industrial) |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 1 (per Microchip packaging profile) |
| RoHS 상태 | Compliant |
24AA02E48T-I/OT 핀 구성
| 핀 1 | SCL — Serial Clock input for I2C bus |
| 핀 2 | SDA — Serial Data input/output for I2C bus (open-drain) |
| 핀 3 | A0 — Chip-select bit 0 (sets I2C slave address LSB) |
| 핀 4 | VSS — Ground reference |
| 핀 5 | VCC — Power supply input, 1.7 V to 5.5 V |
일반적인 애플리케이션
24AA02E48T-I/OT 적합 용도: 8 애플리케이션s: IoT Sensor Nodes with Unique MAC Identity, Industrial Automation Modules, Smart Meter Communication Boards, Wi-Fi/BLE Companion Identification, Consumer Device Configuration Storage, Medical Device Identification, Connected Lighting and LED Nodes, Audio/Video Streaming Endpoints.
IoT Sensor Nodes with Unique MAC Identity
The 24AA02E48T-I/OT is purpose-built for IoT sensor nodes that require a globally unique EUI-48 MAC address without external provisioning. Its factory-programmed 48-bit identity allows Wi-Fi, Bluetooth, IEEE 802.15.4, and Thread modules to read the address over I2C at first boot, removing the need for in-line OTP programming or manual MAC allocation. Operating from 1.7 V to 5.5 V at 1 uA standby lets the part ride directly on coin-cell or harvested-power rails, while the SOT-23-5 footprint fits inside miniature sensor housings. The 1 million write-cycle endurance and >200-year retention easily outlast the deployed lifetime of typical sensor products. Pair the 24AA02E48 with a Wi-Fi/BLE SoC such as the ESP32 family for a complete identity-and-connectivity solution.
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Industrial Automation Modules
In industrial automation the 24AA02E48T-I/OT stores module-level configuration (network addresses, calibration coefficients, asset tags) while the EUI-48 block assigns each module a deterministic identity for PROFINET, EtherNet/IP, or Modbus TCP discovery. The Industrial -40 C to +85 C operating range covers cabinets and outdoor enclosures. A 1 mA active read current and 8-byte page write keep I2C transactions short, which is critical when many nodes share an RS-485-to-I2C bridge. The 2 Kbit density is sufficient for typical module parameter blocks, and the hardware WP pin allows field technicians to lock calibration data after commissioning. The SOT-23-5 footprint integrates easily into the dense PLC backplanes used in modern controllers.
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Smart Meter Communication Boards
Smart electricity, water, and gas meters need a permanent, tamper-resistant identity that survives decades of field deployment. The 24AA02E48T-I/OT combines >200-year data retention, 1 million write cycles, and a factory-locked EUI-48 MAC in a single SOT-23-5 chip, making it ideal for AMI (Advanced Metering Infrastructure) endpoints. The 1.7 V minimum supply voltage means the part can ride directly on a battery-backed RTC rail during blackouts. Its 1 uA standby current is negligible compared with the meter's metrology front-end, and the I2C bus can be shared with the metrology MCU and a wireless M-Bus or LoRa transceiver without bus contention. The factory MAC removes the need for an OTP programmer on the meter assembly line.
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Wi-Fi/BLE Companion Identification
Many Wi-Fi and Bluetooth modules ship without a built-in MAC and rely on the host MCU to provide one. The 24AA02E48T-I/OT sits on the host's I2C bus and delivers the EUI-48 address in under 900 ns, eliminating firmware-side MAC tables. Because the part is rated to 5.5 V, it can be wired directly to a 3.3 V MCU without level shifters and is also tolerant of legacy 5 V designs. The 400 kHz Fast-mode I2C clock is fast enough to service boot-time MAC requests without adding measurable latency. Designers can also use the lower 128-byte block to store Wi-Fi credentials or BLE pairing keys securely, with the hardware WP pin enabling lockdown in the field.
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Consumer Device Configuration Storage
The 24AA02E48T-I/OT is widely used in consumer electronics to retain factory settings, model numbers, and serial-data during power cycles. Its small SOT-23-5 package fits inside appliances, remote controls, toys, and personal-care devices where PCB area is precious. The EUI-48 block provides a unique MAC for connected SKUs that report back to cloud services, allowing traceability of individual units in warranty or RMA flows. With write endurance of 1 million cycles, daily configuration updates over a 10-year product life are well within margin. The 1.7 V minimum supply supports direct connection to single-cell lithium or 2xAA alkaline battery stacks.
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Medical Device Identification
Medical and wellness devices increasingly require unique device identification (UDI) for regulatory tracking. The 24AA02E48T-I/OT stores the EUI-48-based UDI alongside calibration parameters in the lower 128-byte block, giving manufacturers a single chip for both identity and configuration. The Industrial -40 C to +85 C range covers most clinical and home-health environments, and the 1 uA standby current is suitable for battery-powered wearables. Because the EUI-48 block is factory-locked and software write-protected, the UDI cannot be accidentally erased by firmware bugs. The SOT-23-5 footprint enables compact form factors for patches, handheld monitors, and connected pill-boxes.
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Connected Lighting and LED Nodes
Smart-lighting controllers and individually-addressable LED nodes use the 24AA02E48T-I/OT to receive a unique EUI-48 address for commissioning into mesh networks such as Zigbee or BLE Mesh. The 1.7 V to 5.5 V range covers both 3.3 V logic rails and 5 V legacy LED-driver boards. The 1 mA active read current is small relative to typical LED driver power budgets, and the part's small SOT-23-5 footprint fits inside the tight pitch of addressable LED strips. With 8-byte page writes, the host MCU can quickly store lighting presets and per-node trim values into the lower 128-byte block. Factory MAC allocation eliminates per-node programming steps in the assembly line.
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Audio/Video Streaming Endpoints
Networked audio amplifiers, smart speakers, and streaming set-top boxes need a deterministic identity for content-rights management and multi-room synchronization. The 24AA02E48T-I/OT delivers a factory EUI-48 MAC that the SoC reads over I2C at boot, allowing content services to authenticate each endpoint individually. Its 1.7 V minimum supply keeps the part powered during standby, and the 1 uA standby current has no measurable impact on overall wall-plug efficiency. The SOT-23-5 footprint is small enough to sit underneath a shielding can alongside the SoC. The 2 Kbit density can also store room-correction coefficients or DRM keys.
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추천 제품 요약
엔지니어링 참조 데이터: 24AA02E48T-I/OT — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 24AA02E48-I/OT | 24AA02E48T-E/OT | 24AA025E48T-I/OT | 24AA02E64T-I/OT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOT-23-5 (OT) | SOT-23-5 (OT) - same | SOT-23-5 (OT) - same | SOT-23-5 (OT) - same | SOT-23-5 (OT) - same |
| Memory Size | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) |
| Node Identity | EUI-48 (factory) | EUI-48 (factory) | EUI-48 (factory) | EUI-48 (factory) | EUI-64 (factory) |
| Operating Voltage | 1.7 V to 5.5 V | 1.7 V to 5.5 V | 1.7 V to 5.5 V | 1.7 V to 5.5 V | 1.7 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (I grade) | -40 C to +85 C | -40 C to +125 C (E grade) | -40 C to +85 C | -40 C to +85 C |
| I2C Max Clock | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Packaging Format | Tape & Reel (T) | Bulk (no T) | Tape & Reel (T) | Tape & Reel (T) | Tape & Reel (T) |
주요 차별점
- Factory-programmed EUI-48 MAC identity in the upper block (vs 24AA02E48-I/OT)
- Extended temperature range up to +125 C (vs 24AA02E48T-I/OT (this part))
- Larger 64-bit node identity (vs 24AA02E64T-I/OT)
설계 노트
The 24AA02E48T-I/OT draws only 1 uA in standby and 1 mA during active read, so a 100 nF decoupling capacitor placed within 5 mm of the VCC pin is sufficient. During page writes the device briefly sources the I2C pull-up current; ensure the pull-up resistors are sized between 1 kohm and 10 kohm so the rise time stays within the I2C specification at 400 kHz. Designers running from coin cells should place the EEPROM on a rail that remains powered in deep sleep, since the MAC address must be readable before the SoC can join the network.
Do NOT attempt to write to the upper 128-byte block of the 24AA02E48T-I/OT. That block contains the factory-programmed EUI-48 MAC address and is software write-protected per the Microchip datasheet (20002124G). Firmware that blindly writes 0xFF or clears the entire array will leave the device in an indeterminate state. Always clear the WP pin (logic low) for writes to the user block, and leave WP high during boot to protect factory data.
Keep the I2C SDA/SCL traces short (< 50 mm) and route them away from switching converter nodes and high-current traces. The SOT-23-5 pin 2 (SDA) is open-drain, so a pull-up resistor is mandatory - typically 4.7 kohm at 3.3 V. Place the address-select pull-ups/pull-downs on A0 (pin 3) so multiple 24AA02E48 devices can coexist on the bus without bus contention; note that the SOT-23-5 package only exposes A0, so up to four devices are addressable on a shared bus.
Estimated: at 400 kHz with 100 pF bus capacitance the I2C rise time approaches 300 ns, which is at the Fast-mode limit. If the bus is heavily loaded (long cables, multiple devices), lower the clock to 100 kHz Standard-mode or add a bus repeater. Place 4.7 kohm pull-ups on both SDA and SCL; weaker pull-ups (10 kohm) may be acceptable at lower clock rates but compromise noise margin.
규정 준수 정보
RoHS and REACH compliance per Microchip product page. Halogen-free per Microchip packaging statement. AEC-Q100 not applicable for industrial-temperature EEPROM - choose automotive-grade Microchip EEPROMs for AEC-Q100 requirements.
